| Wu Yunyun,Zhang Qingzhao,Song Yanchao,et al.Impact of energy-saving design of residential buildings on both indoor radon concentration and air exchange rate in severe-cold areas and cold areas[J].Chinese Journal of Radiological Medicine and Protection,2020,40(12):945-950 |
| Impact of energy-saving design of residential buildings on both indoor radon concentration and air exchange rate in severe-cold areas and cold areas |
| Received:April 24, 2020 |
| DOI：10.3760/cma.j.issn.0254-5098.2020.12.009 |
| KeyWords:Residential building Energy-saving design Indoor radon concentration Equilibrium factor Air exchange rate |
| FundProject:国家自然科学基金（11375164） |
| Author Name | Affiliation | E-mail | | Wu Yunyun | Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China | | | Zhang Qingzhao | Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China | | | Song Yanchao | Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China | | | Shang Bing | Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China | | | Cui Hongxing | Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China | hxcuicn@163.com |
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| Abstract:: |
| Objective To investigate the influence of energy-saving design of residential buildings with respect to indoor radon concentrations in the severe-cold areas and cold areas. MethodsThe indoor radon concentration and ventilation rate were measured inside 25 houses in 5 different cities. The indoor radon concentration was measured by using RAD7 radon instrument and its progeny concentrations were measured continuously using BWLM-PLUS working level monitor, respectively. The measurement period was 24 h for each dwelling in the condition that doors and windows were closed. The air exchange rate was measured using tracer gas dilution method. Results The average indoor radon concentration was 122 Bq/m3,in the range of 33-255 Bq/m3 during a 24 h-measurement period, with some exceeding 150 Bq/m3 in approximately 36% of measured dwellings. The average radon progeny equilibrium factor was 0.47, ranging from 0.20 to 0.72. The average air exchange rates was 0.19/h, in range of 0.05-0.39/h. The indoor radon concentration showed an increase with the year of construction. However, the ventilation rate decreased with the year of construction. Conclusions The energy saving design of residential buildings is an important influence factor that leads to the increase in radon concentration in China in recent years. The problem that energy-saving design of residential buildings could lead to indoor radon pollution is worthy of attention. |
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